| 功能三维石墨烯-多壁碳纳米管/热塑性聚氨酯复合材料的制备及性能 |
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| 引用本文： | 赵梁成,李斌,武思蕊,李仲明,李覃.功能三维石墨烯-多壁碳纳米管/热塑性聚氨酯复合材料的制备及性能[J].复合材料学报,2020,37(2):242-251. |
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| 作者姓名： | 赵梁成 李斌 武思蕊 李仲明 李覃 |
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| 作者单位： | 昆明理工大学 化学工程学院, 昆明 650500 |
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| 基金项目： | 国家自然科学基金(51167008) |
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| 摘 要： | 采用水热还原法将羧基化多壁碳纳米管（MWCNTs—COOH）接枝到氧化石墨烯（GO）上，经冷冻干燥得到三维石墨烯-多壁碳纳米管气凝胶（GA-MWCNTs），再以热塑性聚氨酯（TPU）为填充体，通过真空浸渍法制得三维石墨烯-多壁碳纳米管/热塑性聚氨酯（GA-MWCNTs/TPU）复合材料。借助FTIR、Raman、XPS、TEM、SEM，对GA-MWCNTs的化学结构、微观形貌进行表征，并通过TGA-DSC、电阻测量仪和力学试验机，分析MWCNTs—COOH质量分数对GA-MWCNTs/TPU复合材料性能的影响。结果表明:MWCNTs—COOH在GO片层间起到交联和支撑作用，形成了蜂窝状三维网络结构，其孔径约为1.2 mm；当MWCNTs—COOH质量分数（以120 mg GO为基准）为10wt%时，GA-MWCNTs/TPU复合材料的导电性、热稳定性、力学性能均得到改善，相比于GA/TPU，体积电阻率降低了63.0%、热分解温度提高了7℃、30%应变下的应力提高了8.2%。
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| 关 键 词： | 多壁碳纳米管 氧化石墨烯 热塑性聚氨酯 导电性 热稳定性 力学性能 |
| 收稿时间： | 2019-02-25 |
Preparation and properties of 3D graphene-multi walled carbon nanotube/thermoplastic polyurethane composites |
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| ZHAO Liangcheng,LI Bin,WU Sirui,LI Zhongming,LI Qin.Preparation and properties of 3D graphene-multi walled carbon nanotube/thermoplastic polyurethane composites[J].Acta Materiae Compositae Sinica,2020,37(2):242-251. |
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| Authors: | ZHAO Liangcheng LI Bin WU Sirui LI Zhongming LI Qin |
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| Affiliation: | Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China |
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| Abstract: | The 3 D graphene-multi walled carbon nanotube/thermoplastic polyurethane(GA-MWCNTs/TPU) composites were prepared using 3 D graphene-multi walled carbon nanotubes aerogels(GA-MWCNTs) and thermoplastic polyurethane(TPU). GA-MWCNTs was prepared by hydrothermal reduction method for grafting carboxylated multi-walled carbon nanotubes(MWCNTs-COOH) onto graphene oxide(GO) and then freeze-drying. Subsequently, the filling TPU was impregnated the GA-MWCNTs in a vacuum state to obtain the GA-MWCNTs/TPU composite. The chemical structure and microstructure of GA-MWCNTs were characterized by means of FTIR, Raman, XPS, TEM and SEM, then MWCNTs-COOH mass fraction effect on the GA-MWCNTs/TPU composite performance was analyzed by means of TGA-DSC, resistance measuring instrument and mechanical testing machine. The results demonstrate that MWCNTs-COOH can cross-linking and support the GO inter-lamellar structures, forming a honeycomb 3 D network structure with a pore size of about 1.2 mm. When the mass fraction of MWCNTs-COOH(using 120 mg GO as reference) is 10 wt%, the electrical conductivity, thermal stability and mechanical properties of GA-MWCNTs/TPU composite are greatly improved. Compared with the GA/TPU, the volume resistivity of GA-MWCNTs/TPU composite reduces by 63.0%, thermal decomposition temperature increases by 7℃, and the stress at 30% strain increases by 8.2%. |
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| Keywords: | multi walled carbon nanotubes graphene oxide thermoplastic polyurethane electrical conductivity thermal stability mechanical properties |
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